//#define DEBUG
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
#include <linux/module.h>
#include <linux/virtio.h>
#include <linux/virtio_net.h>
#include <linux/scatterlist.h>
+#include <linux/if_vlan.h>
static int napi_weight = 128;
module_param(napi_weight, int, 0444);
module_param(gso, bool, 0444);
/* FIXME: MTU in config. */
-#define MAX_PACKET_LEN (ETH_HLEN+ETH_DATA_LEN)
+#define MAX_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN)
+#define GOOD_COPY_LEN 128
struct virtnet_info
{
struct net_device *dev;
struct napi_struct napi;
+ /* The skb we couldn't send because buffers were full. */
+ struct sk_buff *last_xmit_skb;
+
+ /* If we need to free in a timer, this is it. */
+ struct timer_list xmit_free_timer;
+
/* Number of input buffers, and max we've ever had. */
unsigned int num, max;
+ /* For cleaning up after transmission. */
+ struct tasklet_struct tasklet;
+ bool free_in_tasklet;
+
+ /* I like... big packets and I cannot lie! */
+ bool big_packets;
+
+ /* Host will merge rx buffers for big packets (shake it! shake it!) */
+ bool mergeable_rx_bufs;
+
/* Receive & send queues. */
struct sk_buff_head recv;
struct sk_buff_head send;
+
+ /* Chain pages by the private ptr. */
+ struct page *pages;
};
-static inline struct virtio_net_hdr *skb_vnet_hdr(struct sk_buff *skb)
+static inline void *skb_vnet_hdr(struct sk_buff *skb)
{
return (struct virtio_net_hdr *)skb->cb;
}
-static inline void vnet_hdr_to_sg(struct scatterlist *sg, struct sk_buff *skb)
+static void give_a_page(struct virtnet_info *vi, struct page *page)
+{
+ page->private = (unsigned long)vi->pages;
+ vi->pages = page;
+}
+
+static void trim_pages(struct virtnet_info *vi, struct sk_buff *skb)
+{
+ unsigned int i;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+ give_a_page(vi, skb_shinfo(skb)->frags[i].page);
+ skb_shinfo(skb)->nr_frags = 0;
+ skb->data_len = 0;
+}
+
+static struct page *get_a_page(struct virtnet_info *vi, gfp_t gfp_mask)
{
- sg_init_one(sg, skb_vnet_hdr(skb), sizeof(struct virtio_net_hdr));
+ struct page *p = vi->pages;
+
+ if (p)
+ vi->pages = (struct page *)p->private;
+ else
+ p = alloc_page(gfp_mask);
+ return p;
}
static void skb_xmit_done(struct virtqueue *svq)
/* Suppress further interrupts. */
svq->vq_ops->disable_cb(svq);
- /* We were waiting for more output buffers. */
+
+ /* We were probably waiting for more output buffers. */
netif_wake_queue(vi->dev);
+
+ /* Make sure we re-xmit last_xmit_skb: if there are no more packets
+ * queued, start_xmit won't be called. */
+ tasklet_schedule(&vi->tasklet);
}
static void receive_skb(struct net_device *dev, struct sk_buff *skb,
unsigned len)
{
+ struct virtnet_info *vi = netdev_priv(dev);
struct virtio_net_hdr *hdr = skb_vnet_hdr(skb);
+ int err;
+ int i;
if (unlikely(len < sizeof(struct virtio_net_hdr) + ETH_HLEN)) {
pr_debug("%s: short packet %i\n", dev->name, len);
dev->stats.rx_length_errors++;
goto drop;
}
- len -= sizeof(struct virtio_net_hdr);
- BUG_ON(len > MAX_PACKET_LEN);
- skb_trim(skb, len);
- skb->protocol = eth_type_trans(skb, dev);
- pr_debug("Receiving skb proto 0x%04x len %i type %i\n",
- ntohs(skb->protocol), skb->len, skb->pkt_type);
+ if (vi->mergeable_rx_bufs) {
+ struct virtio_net_hdr_mrg_rxbuf *mhdr = skb_vnet_hdr(skb);
+ unsigned int copy;
+ char *p = page_address(skb_shinfo(skb)->frags[0].page);
+
+ if (len > PAGE_SIZE)
+ len = PAGE_SIZE;
+ len -= sizeof(struct virtio_net_hdr_mrg_rxbuf);
+
+ memcpy(hdr, p, sizeof(*mhdr));
+ p += sizeof(*mhdr);
+
+ copy = len;
+ if (copy > skb_tailroom(skb))
+ copy = skb_tailroom(skb);
+
+ memcpy(skb_put(skb, copy), p, copy);
+
+ len -= copy;
+
+ if (!len) {
+ give_a_page(vi, skb_shinfo(skb)->frags[0].page);
+ skb_shinfo(skb)->nr_frags--;
+ } else {
+ skb_shinfo(skb)->frags[0].page_offset +=
+ sizeof(*mhdr) + copy;
+ skb_shinfo(skb)->frags[0].size = len;
+ skb->data_len += len;
+ skb->len += len;
+ }
+
+ while (--mhdr->num_buffers) {
+ struct sk_buff *nskb;
+
+ i = skb_shinfo(skb)->nr_frags;
+ if (i >= MAX_SKB_FRAGS) {
+ pr_debug("%s: packet too long %d\n", dev->name,
+ len);
+ dev->stats.rx_length_errors++;
+ goto drop;
+ }
+
+ nskb = vi->rvq->vq_ops->get_buf(vi->rvq, &len);
+ if (!nskb) {
+ pr_debug("%s: rx error: %d buffers missing\n",
+ dev->name, mhdr->num_buffers);
+ dev->stats.rx_length_errors++;
+ goto drop;
+ }
+
+ __skb_unlink(nskb, &vi->recv);
+ vi->num--;
+
+ skb_shinfo(skb)->frags[i] = skb_shinfo(nskb)->frags[0];
+ skb_shinfo(nskb)->nr_frags = 0;
+ kfree_skb(nskb);
+
+ if (len > PAGE_SIZE)
+ len = PAGE_SIZE;
+
+ skb_shinfo(skb)->frags[i].size = len;
+ skb_shinfo(skb)->nr_frags++;
+ skb->data_len += len;
+ skb->len += len;
+ }
+ } else {
+ len -= sizeof(struct virtio_net_hdr);
+
+ if (len <= MAX_PACKET_LEN)
+ trim_pages(vi, skb);
+
+ err = pskb_trim(skb, len);
+ if (err) {
+ pr_debug("%s: pskb_trim failed %i %d\n", dev->name,
+ len, err);
+ dev->stats.rx_dropped++;
+ goto drop;
+ }
+ }
+
+ skb->truesize += skb->data_len;
dev->stats.rx_bytes += skb->len;
dev->stats.rx_packets++;
goto frame_err;
}
+ skb->protocol = eth_type_trans(skb, dev);
+ pr_debug("Receiving skb proto 0x%04x len %i type %i\n",
+ ntohs(skb->protocol), skb->len, skb->pkt_type);
+
if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
pr_debug("GSO!\n");
switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
dev_kfree_skb(skb);
}
-static void try_fill_recv(struct virtnet_info *vi)
+static void try_fill_recv_maxbufs(struct virtnet_info *vi)
{
struct sk_buff *skb;
- struct scatterlist sg[1+MAX_SKB_FRAGS];
- int num, err;
+ struct scatterlist sg[2+MAX_SKB_FRAGS];
+ int num, err, i;
- sg_init_table(sg, 1+MAX_SKB_FRAGS);
+ sg_init_table(sg, 2+MAX_SKB_FRAGS);
for (;;) {
+ struct virtio_net_hdr *hdr;
+
skb = netdev_alloc_skb(vi->dev, MAX_PACKET_LEN);
if (unlikely(!skb))
break;
skb_put(skb, MAX_PACKET_LEN);
- vnet_hdr_to_sg(sg, skb);
+
+ hdr = skb_vnet_hdr(skb);
+ sg_set_buf(sg, hdr, sizeof(*hdr));
+
+ if (vi->big_packets) {
+ for (i = 0; i < MAX_SKB_FRAGS; i++) {
+ skb_frag_t *f = &skb_shinfo(skb)->frags[i];
+ f->page = get_a_page(vi, GFP_ATOMIC);
+ if (!f->page)
+ break;
+
+ f->page_offset = 0;
+ f->size = PAGE_SIZE;
+
+ skb->data_len += PAGE_SIZE;
+ skb->len += PAGE_SIZE;
+
+ skb_shinfo(skb)->nr_frags++;
+ }
+ }
+
num = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1;
skb_queue_head(&vi->recv, skb);
err = vi->rvq->vq_ops->add_buf(vi->rvq, sg, 0, num, skb);
if (err) {
skb_unlink(skb, &vi->recv);
+ trim_pages(vi, skb);
+ kfree_skb(skb);
+ break;
+ }
+ vi->num++;
+ }
+ if (unlikely(vi->num > vi->max))
+ vi->max = vi->num;
+ vi->rvq->vq_ops->kick(vi->rvq);
+}
+
+static void try_fill_recv(struct virtnet_info *vi)
+{
+ struct sk_buff *skb;
+ struct scatterlist sg[1];
+ int err;
+
+ if (!vi->mergeable_rx_bufs) {
+ try_fill_recv_maxbufs(vi);
+ return;
+ }
+
+ for (;;) {
+ skb_frag_t *f;
+
+ skb = netdev_alloc_skb(vi->dev, GOOD_COPY_LEN + NET_IP_ALIGN);
+ if (unlikely(!skb))
+ break;
+
+ skb_reserve(skb, NET_IP_ALIGN);
+
+ f = &skb_shinfo(skb)->frags[0];
+ f->page = get_a_page(vi, GFP_ATOMIC);
+ if (!f->page) {
+ kfree_skb(skb);
+ break;
+ }
+
+ f->page_offset = 0;
+ f->size = PAGE_SIZE;
+
+ skb_shinfo(skb)->nr_frags++;
+
+ sg_init_one(sg, page_address(f->page), PAGE_SIZE);
+ skb_queue_head(&vi->recv, skb);
+
+ err = vi->rvq->vq_ops->add_buf(vi->rvq, sg, 0, 1, skb);
+ if (err) {
+ skb_unlink(skb, &vi->recv);
kfree_skb(skb);
break;
}
{
struct virtnet_info *vi = rvq->vdev->priv;
/* Schedule NAPI, Suppress further interrupts if successful. */
- if (netif_rx_schedule_prep(vi->dev, &vi->napi)) {
+ if (netif_rx_schedule_prep(&vi->napi)) {
rvq->vq_ops->disable_cb(rvq);
- __netif_rx_schedule(vi->dev, &vi->napi);
+ __netif_rx_schedule(&vi->napi);
}
}
/* Out of packets? */
if (received < budget) {
- netif_rx_complete(vi->dev, napi);
+ netif_rx_complete(napi);
if (unlikely(!vi->rvq->vq_ops->enable_cb(vi->rvq))
- && netif_rx_reschedule(vi->dev, napi))
+ && napi_schedule_prep(napi)) {
+ vi->rvq->vq_ops->disable_cb(vi->rvq);
+ __netif_rx_schedule(napi);
goto again;
+ }
}
return received;
while ((skb = vi->svq->vq_ops->get_buf(vi->svq, &len)) != NULL) {
pr_debug("Sent skb %p\n", skb);
__skb_unlink(skb, &vi->send);
- vi->dev->stats.tx_bytes += len;
+ vi->dev->stats.tx_bytes += skb->len;
vi->dev->stats.tx_packets++;
kfree_skb(skb);
}
}
-static int start_xmit(struct sk_buff *skb, struct net_device *dev)
+/* If the virtio transport doesn't always notify us when all in-flight packets
+ * are consumed, we fall back to using this function on a timer to free them. */
+static void xmit_free(unsigned long data)
+{
+ struct virtnet_info *vi = (void *)data;
+
+ netif_tx_lock(vi->dev);
+
+ free_old_xmit_skbs(vi);
+
+ if (!skb_queue_empty(&vi->send))
+ mod_timer(&vi->xmit_free_timer, jiffies + (HZ/10));
+
+ netif_tx_unlock(vi->dev);
+}
+
+static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
{
- struct virtnet_info *vi = netdev_priv(dev);
int num, err;
- struct scatterlist sg[1+MAX_SKB_FRAGS];
- struct virtio_net_hdr *hdr;
+ struct scatterlist sg[2+MAX_SKB_FRAGS];
+ struct virtio_net_hdr_mrg_rxbuf *mhdr = skb_vnet_hdr(skb);
+ struct virtio_net_hdr *hdr = skb_vnet_hdr(skb);
const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest;
- DECLARE_MAC_BUF(mac);
- sg_init_table(sg, 1+MAX_SKB_FRAGS);
+ sg_init_table(sg, 2+MAX_SKB_FRAGS);
- pr_debug("%s: xmit %p %s\n", dev->name, skb, print_mac(mac, dest));
+ pr_debug("%s: xmit %p %pM\n", vi->dev->name, skb, dest);
- /* Encode metadata header at front. */
- hdr = skb_vnet_hdr(skb);
if (skb->ip_summed == CHECKSUM_PARTIAL) {
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = skb->csum_start - skb_headroom(skb);
hdr->gso_size = hdr->hdr_len = 0;
}
- vnet_hdr_to_sg(sg, skb);
+ mhdr->num_buffers = 0;
+
+ /* Encode metadata header at front. */
+ if (vi->mergeable_rx_bufs)
+ sg_set_buf(sg, mhdr, sizeof(*mhdr));
+ else
+ sg_set_buf(sg, hdr, sizeof(*hdr));
+
num = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1;
- __skb_queue_head(&vi->send, skb);
+
+ err = vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb);
+ if (!err && !vi->free_in_tasklet)
+ mod_timer(&vi->xmit_free_timer, jiffies + (HZ/10));
+
+ return err;
+}
+
+static void xmit_tasklet(unsigned long data)
+{
+ struct virtnet_info *vi = (void *)data;
+
+ netif_tx_lock_bh(vi->dev);
+ if (vi->last_xmit_skb && xmit_skb(vi, vi->last_xmit_skb) == 0) {
+ vi->svq->vq_ops->kick(vi->svq);
+ vi->last_xmit_skb = NULL;
+ }
+ if (vi->free_in_tasklet)
+ free_old_xmit_skbs(vi);
+ netif_tx_unlock_bh(vi->dev);
+}
+
+static int start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct virtnet_info *vi = netdev_priv(dev);
again:
/* Free up any pending old buffers before queueing new ones. */
free_old_xmit_skbs(vi);
- err = vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb);
- if (err) {
- pr_debug("%s: virtio not prepared to send\n", dev->name);
- netif_stop_queue(dev);
-
- /* Activate callback for using skbs: if this fails it
- * means some were used in the meantime. */
- if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
- printk("Unlikely: restart svq failed\n");
- netif_start_queue(dev);
- goto again;
- }
- __skb_unlink(skb, &vi->send);
- return NETDEV_TX_BUSY;
+ /* If we has a buffer left over from last time, send it now. */
+ if (unlikely(vi->last_xmit_skb) &&
+ xmit_skb(vi, vi->last_xmit_skb) != 0)
+ goto stop_queue;
+
+ vi->last_xmit_skb = NULL;
+
+ /* Put new one in send queue and do transmit */
+ if (likely(skb)) {
+ __skb_queue_head(&vi->send, skb);
+ if (xmit_skb(vi, skb) != 0) {
+ vi->last_xmit_skb = skb;
+ skb = NULL;
+ goto stop_queue;
+ }
}
+done:
vi->svq->vq_ops->kick(vi->svq);
+ return NETDEV_TX_OK;
+
+stop_queue:
+ pr_debug("%s: virtio not prepared to send\n", dev->name);
+ netif_stop_queue(dev);
+
+ /* Activate callback for using skbs: if this returns false it
+ * means some were used in the meantime. */
+ if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
+ vi->svq->vq_ops->disable_cb(vi->svq);
+ netif_start_queue(dev);
+ goto again;
+ }
+ if (skb) {
+ /* Drop this skb: we only queue one. */
+ vi->dev->stats.tx_dropped++;
+ kfree_skb(skb);
+ }
+ goto done;
+}
- return 0;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void virtnet_netpoll(struct net_device *dev)
+{
+ struct virtnet_info *vi = netdev_priv(dev);
+
+ napi_schedule(&vi->napi);
}
+#endif
static int virtnet_open(struct net_device *dev)
{
/* If all buffers were filled by other side before we napi_enabled, we
* won't get another interrupt, so process any outstanding packets
- * now. virtnet_poll wants re-enable the queue, so we disable here. */
- vi->rvq->vq_ops->disable_cb(vi->rvq);
- netif_rx_schedule(vi->dev, &vi->napi);
-
+ * now. virtnet_poll wants re-enable the queue, so we disable here.
+ * We synchronize against interrupts via NAPI_STATE_SCHED */
+ if (netif_rx_schedule_prep(&vi->napi)) {
+ vi->rvq->vq_ops->disable_cb(vi->rvq);
+ __netif_rx_schedule(&vi->napi);
+ }
return 0;
}
return 0;
}
+static int virtnet_set_tx_csum(struct net_device *dev, u32 data)
+{
+ struct virtnet_info *vi = netdev_priv(dev);
+ struct virtio_device *vdev = vi->vdev;
+
+ if (data && !virtio_has_feature(vdev, VIRTIO_NET_F_CSUM))
+ return -ENOSYS;
+
+ return ethtool_op_set_tx_hw_csum(dev, data);
+}
+
+static struct ethtool_ops virtnet_ethtool_ops = {
+ .set_tx_csum = virtnet_set_tx_csum,
+ .set_sg = ethtool_op_set_sg,
+ .set_tso = ethtool_op_set_tso,
+};
+
+#define MIN_MTU 68
+#define MAX_MTU 65535
+
+static int virtnet_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if (new_mtu < MIN_MTU || new_mtu > MAX_MTU)
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+static const struct net_device_ops virtnet_netdev = {
+ .ndo_open = virtnet_open,
+ .ndo_stop = virtnet_close,
+ .ndo_start_xmit = start_xmit,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_change_mtu = virtnet_change_mtu,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = virtnet_netpoll,
+#endif
+};
+
static int virtnet_probe(struct virtio_device *vdev)
{
int err;
return -ENOMEM;
/* Set up network device as normal. */
- dev->open = virtnet_open;
- dev->stop = virtnet_close;
- dev->hard_start_xmit = start_xmit;
+ dev->netdev_ops = &virtnet_netdev;
dev->features = NETIF_F_HIGHDMA;
+ SET_ETHTOOL_OPS(dev, &virtnet_ethtool_ops);
SET_NETDEV_DEV(dev, &vdev->dev);
/* Do we support "hardware" checksums? */
- if (csum && vdev->config->feature(vdev, VIRTIO_NET_F_CSUM)) {
+ if (csum && virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) {
/* This opens up the world of extra features. */
dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
- if (gso && vdev->config->feature(vdev, VIRTIO_NET_F_GSO)) {
+ if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) {
dev->features |= NETIF_F_TSO | NETIF_F_UFO
| NETIF_F_TSO_ECN | NETIF_F_TSO6;
}
+ /* Individual feature bits: what can host handle? */
+ if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4))
+ dev->features |= NETIF_F_TSO;
+ if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6))
+ dev->features |= NETIF_F_TSO6;
+ if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN))
+ dev->features |= NETIF_F_TSO_ECN;
+ if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO))
+ dev->features |= NETIF_F_UFO;
}
/* Configuration may specify what MAC to use. Otherwise random. */
- if (vdev->config->feature(vdev, VIRTIO_NET_F_MAC)) {
+ if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) {
vdev->config->get(vdev,
offsetof(struct virtio_net_config, mac),
dev->dev_addr, dev->addr_len);
netif_napi_add(dev, &vi->napi, virtnet_poll, napi_weight);
vi->dev = dev;
vi->vdev = vdev;
+ vdev->priv = vi;
+ vi->pages = NULL;
+
+ /* If they give us a callback when all buffers are done, we don't need
+ * the timer. */
+ vi->free_in_tasklet = virtio_has_feature(vdev,VIRTIO_F_NOTIFY_ON_EMPTY);
+
+ /* If we can receive ANY GSO packets, we must allocate large ones. */
+ if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4)
+ || virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6)
+ || virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN))
+ vi->big_packets = true;
+
+ if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF))
+ vi->mergeable_rx_bufs = true;
/* We expect two virtqueues, receive then send. */
vi->rvq = vdev->config->find_vq(vdev, 0, skb_recv_done);
skb_queue_head_init(&vi->recv);
skb_queue_head_init(&vi->send);
+ tasklet_init(&vi->tasklet, xmit_tasklet, (unsigned long)vi);
+
+ if (!vi->free_in_tasklet)
+ setup_timer(&vi->xmit_free_timer, xmit_free, (unsigned long)vi);
+
err = register_netdev(dev);
if (err) {
pr_debug("virtio_net: registering device failed\n");
}
pr_debug("virtnet: registered device %s\n", dev->name);
- vdev->priv = vi;
return 0;
unregister:
/* Stop all the virtqueues. */
vdev->config->reset(vdev);
+ if (!vi->free_in_tasklet)
+ del_timer_sync(&vi->xmit_free_timer);
+
/* Free our skbs in send and recv queues, if any. */
while ((skb = __skb_dequeue(&vi->recv)) != NULL) {
kfree_skb(skb);
vi->num--;
}
- while ((skb = __skb_dequeue(&vi->send)) != NULL)
- kfree_skb(skb);
+ __skb_queue_purge(&vi->send);
BUG_ON(vi->num != 0);
vdev->config->del_vq(vi->svq);
vdev->config->del_vq(vi->rvq);
unregister_netdev(vi->dev);
+
+ while (vi->pages)
+ __free_pages(get_a_page(vi, GFP_KERNEL), 0);
+
free_netdev(vi->dev);
}
{ 0 },
};
+static unsigned int features[] = {
+ VIRTIO_NET_F_CSUM, VIRTIO_NET_F_GUEST_CSUM,
+ VIRTIO_NET_F_GSO, VIRTIO_NET_F_MAC,
+ VIRTIO_NET_F_HOST_TSO4, VIRTIO_NET_F_HOST_UFO, VIRTIO_NET_F_HOST_TSO6,
+ VIRTIO_NET_F_HOST_ECN, VIRTIO_NET_F_GUEST_TSO4, VIRTIO_NET_F_GUEST_TSO6,
+ VIRTIO_NET_F_GUEST_ECN, /* We don't yet handle UFO input. */
+ VIRTIO_NET_F_MRG_RXBUF,
+ VIRTIO_F_NOTIFY_ON_EMPTY,
+};
+
static struct virtio_driver virtio_net = {
+ .feature_table = features,
+ .feature_table_size = ARRAY_SIZE(features),
.driver.name = KBUILD_MODNAME,
.driver.owner = THIS_MODULE,
.id_table = id_table,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff